See Boll, C.; Leppin, J.; Rossen, A.; Wolf, A. (2016), "Magnitude and Impact Factors of the Gender Pay Gap in EU Countries, Report prepared for and financed by the European Commission - Directorate-General for Justice and Consumers.
Zie: Boll, C., Leppin, J., Rossen, A., Wolf, A. (2016), "Magnitude and Impact Factors of the Gender Pay Gap in EU Countries, verslag opgesteld in opdracht van en gefinancierd door de Europese Commissie - Directoraat-generaal Justitie en Consumentenzaken.